Gas Sensing Properties of Gallium Nitride-Coated Cellulose Nanocomposite
This paper reports gas sensing properties of gallium nitride (GaN)-coated cellulose nanocomposite. To fabricate GaN nanoparticles, Gallium nitrate (Ga(NO3)3) was used as precursors and GaN nanoparticles with average diameter of 7 nm were made by a sol–gel
method, followed by nitridation. Ammonia (NH3) and nitrogen dioxide (NO2) gas sensor was made by coating the GaN nanoparticles on a flexible cellulose paper on which gold electrodes were patterned. The GaN-coated cellulose nanocomposite gas sensor shows a good sensitivity
and repeatability for NH3 and NO2 gases. This gas sensor exhibits fast response and recovery times at room temperature. The gas sensing mechanism of the sensor is explained.
Keywords: AMMONIA; GALLIUM NITRIDE; GAS SENSOR; HYBRID NANOCOMPOSITE; NITROGEN DIOXIDE; SOL-GEL
Document Type: Research Article
Publication date: 01 March 2012
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